+
+ from->maclength = maclength;
+
+ if(digest) {
+ from->digest = digest;
+
+ if(!*gcry_md_algo_name(from->digest)) {
+ logger(LOG_ERR, _("Node %s (%s) uses unknown digest!"), from->name,
+ from->hostname);
+ return false;
+ }
+
+ from->digestlen = gcry_md_get_algo_dlen(from->digest);
+
+ if(from->maclength > from->digestlen || from->maclength < 0) {
+ logger(LOG_ERR, _("Node %s (%s) uses bogus MAC length!"),
+ from->name, from->hostname);
+ return false;
+ }
+ } else {
+ from->digest = GCRY_MD_NONE;
+ }
+
+ if(compression < 0 || compression > 11) {
+ logger(LOG_ERR, _("Node %s (%s) uses bogus compression level!"), from->name, from->hostname);
+ return false;
+ }
+
+ from->compression = compression;
+
+ /* Update our copy of the origin's packet key */
+
+ if(from->cipherkey)
+ free(from->cipherkey);
+
+ from->cipherkeylen = strlen(cipherkey) / 2;
+ from->cipherkey = xmalloc(from->cipherkeylen);
+ hex2bin(cipherkey, from->cipherkey, from->cipherkeylen);
+
+ if(from->cipherkeylen != gcry_cipher_get_algo_keylen(from->cipher)) {
+ logger(LOG_ERR, _("Node %s (%s) uses wrong keylength %d instead of %d!"), from->name,
+ from->hostname, from->cipherkeylen, gcry_cipher_get_algo_keylen(from->cipher) );
+ return false;
+ }
+
+ if(from->digestkey)
+ free(from->digestkey);
+
+ from->digestlen = strlen(digestkey) / 2;
+ from->digestkey = xmalloc(from->digestlen);
+ hex2bin(digestkey, from->digestkey, from->digestlen);
+
+ if(from->cipher) {
+ int result;
+ result = gcry_cipher_open(&from->cipher_ctx, from->cipher, GCRY_CIPHER_MODE_CBC, GCRY_CIPHER_SECURE);
+ gcry_cipher_setkey(from->cipher_ctx, from->cipherkey, from->cipherkeylen);
+ if(result) {
+ logger(LOG_ERR, _("Error during initialisation of key from %s (%s): %s"),
+ from->name, from->hostname, gcry_strerror(result));
+ return false;
+ }
+ }
+
+ if(from->digest) {
+ int result;
+ result = gcry_md_open(&from->digest_ctx, from->digest, GCRY_MD_FLAG_SECURE | GCRY_MD_FLAG_HMAC);
+ gcry_md_setkey(from->digest_ctx, from->digestkey, from->digestlen);
+ if(result) {
+ logger(LOG_ERR, _("Error during initialisation of key from %s (%s): %s"),
+ from->name, from->hostname, gcry_strerror(result));
+ return false;
+ }
+ }
+
+ from->status.validkey = true;
+ from->status.waitingforkey = false;
+ from->sent_seqno = 0;
+
+ if(from->options & OPTION_PMTU_DISCOVERY && !from->mtuprobes)
+ send_mtu_probe(from);
+
+ flush_queue(from);
+
+ return true;